Caterpillar shovel slewing vertical shaft device and caterpillar shovel

Abstract

The application discloses a kind of electric shovel slewing vertical shaft devices, including slewing vertical shaft, shaft sleeve, slewing pinion, bearing, the shaft end baffle fixed in the lower end of slewing vertical shaft by coupling bolt and pressure sensing system, pressure sensing system includes power module, wireless transmitting module and wireless receiving module, each bolt hole on the shaft end baffle is provided with a pressure sensor, power module is fixed on the bottom surface of shaft end baffle, pressure sensor is electrically connected to power module and is connected with wireless transmitting module, wireless receiving module is arranged on the slewing platform of electric shovel, wireless transmitting module is communicatively connected to wireless receiving module, wireless receiving module is communicatively connected to alarm device arranged in the cab of electric shovel.The application monitors the state of coupling bolt in real time through pressure sensing system, when monitoring that coupling bolt loosens, alarm signal is formed in the cab of electric shovel, avoid safety accident to occur, improve the safety of equipment.

Description

Technical Field

[0001] This invention belongs to the field of electric shovel technology, specifically relating to an electric shovel rotary shaft device and an electric shovel including the electric shovel rotary shaft device. Background Technology

[0002] Electric shovels are single-bucket excavators that use gears, chains, steel cables, pulley blocks, and other transmission components to transmit power. They are one of the main mining equipment in open-pit mines with a capacity of tens of millions of tons. They have high productivity, high operating rate, and low operating costs, and are recognized as a model in the mining industry. Electric shovels consist of a walking device, a slewing device, a working device, a lubrication system, an air supply system, and a lifting mechanism.

[0003] The slewing shaft assembly is a key component of the electric shovel, and the reliability of its structural connections directly affects the overall machine's mobility. In existing technology, the inner bore of the slewing shaft bushing is tapered, making it inconvenient to measure the depth of the inner bore before assembly. Furthermore, after the slewing pinion is connected to the slewing shaft via a spline connection, the dimensions of the slewing shaft end plate and the end face of the slewing shaft cannot be measured, making it impossible to determine the specific clearance. The bolt connection of the slewing shaft end plate is unreliable and prone to shearing. Without a monitoring system to monitor the connection, if the shovel is still rotating and the slewing pinion falls off due to bolt shearing, it can easily cause a major accident, resulting in damage to the slewing pinion and large gear ring, and bending and deformation of the slewing shaft, posing a significant safety hazard. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a rotary shaft device for an electric shovel. This rotary shaft device is installed on the rotary platform of an electric shovel. The device includes a rotary shaft, a bushing sleeved around the outer circumference of the rotary shaft, a rotary pinion disposed on the outer circumference of the lower end of the rotary shaft, a bearing disposed between the rotary pinion and the bushing and cooperating with the rotary shaft, a shaft end baffle fixed to the lower end of the rotary shaft by connecting bolts, and a pressure sensing system, wherein:

[0005] The end of the rotary pinion away from the bushing is provided with a limiting groove that matches the shaft end baffle. The outer diameter of the shaft end baffle matches the inner diameter of the limiting groove. The shaft end baffle is embedded in the limiting groove. Multiple connecting bolts pass through multiple bolt holes on the shaft end baffle and are screwed to the lower end of the rotary vertical shaft.

[0006] The inner diameter of the bushing matches the outer diameter of the rotary vertical shaft. The inner hole of the bushing is provided with an assembly tapered hole section, the diameter of which gradually decreases from top to bottom. The rotary vertical shaft is provided with an assembly tapered surface section, the diameter of which gradually decreases from top to bottom. The assembly tapered surface section matches the assembly tapered hole section.

[0007] A measuring hole is provided on the shaft end baffle. The measuring hole is used to measure the gap between the lower end face of the rotary vertical shaft and the shaft end baffle. A shim is installed in the gap between the lower end face of the rotary vertical shaft and the shaft end baffle.

[0008] The pressure sensing system includes a pressure sensor, a power module, a wireless transmitter module, and a wireless receiver module. A pressure sensor is installed at each bolt hole on the shaft end plate. The power module is fixed to the end face of the shaft end plate away from the slewing shaft end. Each pressure sensor is electrically connected to the power module, and each pressure sensor is connected to a wireless transmitter module. The wireless receiver module is installed on the slewing platform of the electric shovel, and the wireless transmitter module is communicatively connected to the wireless receiver module. The wireless receiver module is communicatively connected to an alarm device installed in the electric shovel's cab.

[0009] Furthermore, in the above-mentioned electric shovel rotary shaft device, the pressure sensor is a washer-type pressure sensor. The inner diameter of the washer of the washer-type pressure sensor matches the outer diameter of the connecting bolt. The washer-type pressure sensor determines whether the connecting bolt is loose by monitoring the screw-out angle of the connecting bolt or the clamping force applied by the connecting bolt to the washer.

[0010] Furthermore, in the above-mentioned electric shovel rotary shaft device, the gasket is provided with through holes, and the number and size of the through holes correspond to the number and size of the bolt holes opened on the shaft end baffle.

[0011] Furthermore, in the above-mentioned electric shovel rotary shaft device, the number of connecting bolts is 6 to 10, and the connecting bolts are evenly distributed around the center of the shaft end baffle in the circumferential direction.

[0012] In addition, the present invention also provides an electric shovel, which includes the above-mentioned electric shovel rotary shaft device.

[0013] The electric shovel rotary shaft device of the present invention has the following advantages and beneficial effects:

[0014] (1) The electric shovel slewing shaft device of the present invention is equipped with a pressure sensing system. By setting pressure sensors at each bolt hole, the status of the connecting bolts can be monitored in real time. When any connecting bolt is detected to be loose, the pressure sensor corresponding to the connecting bolt transmits the signal through the wireless transmitting module to the wireless receiving module and finally to the alarm device, thereby forming an alarm signal in the electric shovel cab to remind the driver to inspect or replace the connecting bolts, thus avoiding the safety accident caused by the loose connecting bolts falling off the slewing pinion and improving the safety of the equipment.

[0015] (2) The electric shovel rotary shaft device of the present invention has a measuring hole on the shaft end baffle. The gap between the shaft end of the rotary shaft and the shaft end baffle can be accurately measured through the measuring hole. Therefore, an appropriate amount of shims can be installed according to the actual measured gap between the shaft end of the rotary shaft and the shaft end baffle, thereby ensuring a stable and reliable connection between the rotary shaft and the shaft end baffle and further improving the safety of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the electric shovel rotary shaft device of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the shaft end baffle in the electric shovel rotary shaft device of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the bushing in the electric shovel rotary shaft device of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Rotating vertical shaft, 11-Assembly conical section, 2-Shaft sleeve, 21-Assembly conical hole section, 3-Rotating pinion, 4-Bearing, 5-Shaft end baffle, 51-Pressure sensor, 52-Power module, 53-Wireless transmission module, 54-Measuring hole, 6-Connecting bolt, 7-Shim, 100-Rotating platform. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] like Figures 1 to 3As shown, the electric shovel slewing shaft device of the present invention is installed on the slewing platform 100 of the electric shovel, including a slewing shaft 1, a bushing 2 sleeved on the outer periphery of the slewing shaft 1, a slewing pinion 3 disposed on the outer periphery of the lower end of the slewing shaft 1, a bearing 4 disposed between the slewing pinion 3 and the bushing 2 and cooperating with the slewing shaft 1, a shaft end baffle 5 fixed to the lower end of the slewing shaft 1 by connecting bolts 6, and a pressure sensing system.

[0024] The inner diameter of the bushing 2 matches the outer diameter of the rotary vertical shaft 1. The inner hole of the bushing 2 is provided with an assembly tapered hole section 21, the diameter of which gradually decreases from top to bottom. The rotary vertical shaft 1 is provided with an assembly tapered surface section 11, the diameter of which gradually decreases from top to bottom. The assembly tapered surface section 11 of the rotary vertical shaft 1 and the assembly tapered hole section 21 of the bushing 2 match each other, thereby ensuring reliable assembly of the rotary vertical shaft 1 and the bushing 2.

[0025] The lower end of the rotary pinion 3, that is, the end away from the bushing 2, is provided with a limiting groove that matches the shaft end baffle 5. The outer diameter of the shaft end baffle 5 matches the inner diameter of the limiting groove. The shaft end baffle 5 is embedded in the limiting groove. Multiple connecting bolts 6 pass through multiple bolt holes opened on the shaft end baffle 5 and are screwed to the lower end of the rotary vertical shaft 1. Thus, the rotary vertical shaft 1, the shaft end baffle 5, and the rotary pinion 3 are fixed to each other by the connecting bolts 6.

[0026] The shaft end baffle 5 is provided with a measuring hole 54. Through the measuring hole 54, a measuring tool can be used to accurately measure the gap between the lower end face of the rotary vertical shaft 1 and the shaft end baffle 5. Thus, according to the actual gap between the shaft end of the rotary vertical shaft 1 and the shaft end baffle 5, the required number of shims 7 can be installed to ensure that the connection between the rotary vertical shaft 1 and the shaft end baffle 5 is more stable and reliable, and to improve the safety of the equipment.

[0027] Furthermore, the gasket 7 has through holes, the number and size of which correspond to the number and size of bolt holes on the shaft end baffle 5, thereby facilitating the installation of the gasket 7 in the gap between the shaft end of the rotary vertical shaft 1 and the shaft end baffle 5.

[0028] In one specific embodiment, the number of connecting bolts 6 in the electric shovel rotary shaft device of the present invention is 6 to 10, more specifically, the number of connecting bolts 6 is 8, which are evenly distributed around the center of the shaft end baffle 5 in the circumferential direction. Of course, the number of connecting bolts 6 can be determined according to the specific dimensions of the rotary shaft 1, the rotary pinion 3, and the shaft end baffle 5 in actual use.

[0029] The pressure sensing system in the shovel's rotating shaft device of the present invention includes: a pressure sensor 51, a power module 52, a wireless transmitter module 53, and a wireless receiver module. A pressure sensor 51 is installed at each bolt hole on the shaft end plate 5. The power module 52 is fixed to the bottom surface of the shaft end plate 5, i.e., its end face away from the shaft end of the rotating shaft 1. Each pressure sensor 51 is electrically connected to the power module 52, and each pressure sensor 51 is connected to a wireless transmitter module 53. A wireless receiver module (not shown in the figure) is installed on the shovel's rotating platform 100. The wireless transmitter module 53 is communicatively connected to the wireless receiver module, and the wireless receiver module is communicatively connected to an alarm device (not shown in the figure) installed in the shovel's cab. When the pressure sensor 51 detects that the connecting bolt 6 is loose, the pressure sensor 51 transmits the monitoring signal via the wireless transmitter module 53 to the wireless receiver module and finally to the alarm device, thereby generating an alarm signal such as a warning light or alarm horn in the shovel's cab, reminding the driver to inspect or replace the connecting bolt 6.

[0030] In one specific embodiment, in the electric shovel rotary shaft device of the present invention, the pressure sensor 51 can be a washer-type pressure sensor. The inner diameter of the washer of the washer-type pressure sensor matches the outer diameter of the connecting bolt 6. The washer-type pressure sensor determines whether the connecting bolt 6 is loose by monitoring the screw-out angle of the connecting bolt 6 or the clamping force applied by the connecting bolt 6 to the washer.

[0031] In summary, compared with the prior art, the electric shovel rotary shaft device of the present invention has the following advantages and beneficial effects:

[0032] (1) The electric shovel slewing shaft device of the present invention is equipped with a pressure sensing system. The pressure sensor 51 installed at each bolt hole can monitor the status of the connecting bolt 6 in real time. When any connecting bolt 6 is detected to be loose, the pressure sensor 51 corresponding to the connecting bolt 6 transmits the signal to the wireless receiving module via the wireless transmitting module 53 and finally to the alarm device. This generates an alarm signal in the electric shovel cab, reminding the driver to inspect or replace the connecting bolt 6, thus avoiding the safety accident caused by the loose connecting bolt 6 leading to the falling of the slewing pinion and improving the safety of the equipment.

[0033] (2) In the electric shovel rotary shaft device of the present invention, a measuring hole 54 is provided on the shaft end baffle 5. The gap between the shaft end of the rotary shaft 1 and the shaft end baffle 5 can be accurately measured through the measuring hole 54. Therefore, an appropriate amount of shims 7 can be installed according to the actual measured gap between the shaft end of the rotary shaft 1 and the shaft end baffle 5, thereby ensuring a stable and reliable connection between the rotary shaft 1 and the shaft end baffle 5, and further improving the safety of the equipment.

[0034] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary shaft device for an electric shovel, installed on the rotary platform of the electric shovel, characterized in that, The electric shovel's rotating vertical shaft device includes a rotating vertical shaft, a bushing sleeved around the outer circumference of the rotating vertical shaft, a small rotating gear disposed on the outer circumference of the lower end of the rotating vertical shaft, a bearing disposed between the small rotating gear and the bushing and cooperating with the rotating vertical shaft, a shaft end baffle fixed to the lower end of the rotating vertical shaft by connecting bolts, and a pressure sensing system, wherein: The end of the rotary pinion away from the bushing is provided with a limiting groove that matches the shaft end baffle. The outer diameter of the shaft end baffle matches the inner diameter of the limiting groove. The shaft end baffle is embedded in the limiting groove. Multiple connecting bolts pass through multiple bolt holes on the shaft end baffle and are screwed to the lower end of the rotary vertical shaft. The inner diameter of the bushing matches the outer diameter of the rotary vertical shaft. The inner hole of the bushing is provided with an assembly tapered hole section, the diameter of which gradually decreases from top to bottom. The rotary vertical shaft is provided with an assembly tapered surface section, the diameter of which gradually decreases from top to bottom. The assembly tapered surface section matches the assembly tapered hole section. A measuring hole is provided on the shaft end baffle. The measuring hole is used to measure the gap between the lower end face of the rotary vertical shaft and the shaft end baffle. A shim is installed in the gap between the lower end face of the rotary vertical shaft and the shaft end baffle. The pressure sensing system includes a pressure sensor, a power module, a wireless transmitter module, and a wireless receiver module. Each pressure sensor is installed at each bolt hole on the shaft end baffle. The power module is fixed to the end face of the shaft end baffle away from the end of the rotating vertical shaft. Each pressure sensor is electrically connected to the power module and connected to a wireless transmitter module. The wireless receiver module is installed on the rotating platform of the electric shovel. The wireless transmitter module is communicatively connected to the wireless receiver module. The wireless receiver module is communicatively connected to an alarm device installed in the electric shovel cab. The pressure sensor is a washer-type pressure sensor, and the inner diameter of the washer of the washer-type pressure sensor matches the outer diameter of the connecting bolt. The washer-type pressure sensor determines whether the connecting bolt is loose by monitoring the screw-out angle of the connecting bolt or the clamping force applied by the connecting bolt to the washer.

2. The electric shovel rotary shaft device according to claim 1, characterized in that, The gasket has through holes, and the number and size of the through holes correspond to the number and size of the bolt holes on the shaft end baffle.

3. The electric shovel rotary shaft device according to claim 1, characterized in that, The number of connecting bolts is 6 to 10, and the connecting bolts are evenly distributed around the center of the shaft end baffle in the circumferential direction.

4. An electric shovel, characterized in that, The electric shovel includes the electric shovel rotary shaft device as described in any one of claims 1-3.

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